Rear tyres...noise and vibration

Hi all,
can anyone tell me why the rear tyres on my 2000 FL have worn in a strange pattern. Ive had a droning noise and some vibration from the rear, so changed the rear tyres to the front and VVersa. Lo and behold the vibration and noise is now at the front.
4wd works fine (although there is a bump from the rear diff when spinning in the snow), On full lock, the transmission tries to wind up, going forwards or backwards, it feels like the handbrake is gently being applied.

Also have noticed that since refitting the prop, a horrible grinding noise (under heavy acceleration) has completely disappeared. Anyone know what this is?
Thanks, Russ

have a search for VCU and IRD on here...

I don't know much about gaylanders but i do know they don't like mismatched tyres.

stop driving it now! Your VCU has failed. remove the props and vcu and drive in 2wd until you get a new VCU. You have already caused some damage to the diffs.

howardo said:

remove the props and vcu and drive in 2wd until you get a new VCU

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Surely if he does that he'll have 0wd!

lerk said:

Surely if he does that he'll have 0wd!

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depends on the damage done (if any) to the ird.

howardo said:

depends on the damage done (if any) to the ird.

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I was being pedantic there, he'll only need to remove one prop... lol

lerk said:

Surely if he does that he'll have 0wd!

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it is advised to remove the props and vcu as a complete assembly to avoid causing any damage to them.

I put the prop back on this week cos of the snow, will remove it when it thaws...But the grinding noise will be back....can you tell me what this is?

Incidentally, why do some folk suggest an IRD blanking plate thing? what is its purpose?

it'll be the damage done to the diff

howardo said:

it'll be the damage done to the diff

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Front diff?
IRD?
or are the same thing?
Not rear diff?
cheers
Russ

ird is the front diff, fd is the rear diff. the noise will tell you which one is damaged.

The noise is only evident in 4th and 5th gear, at very low revs, and under heavy load. Not the rear diff, cos it is only there with the prop removed.

The rear diff is stil being rotated, without the prop, cos of the rear wheels.

The Mad Hat Man said:

The rear diff is stil being rotated, without the prop, cos of the rear wheels.

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Noise is coming from the front.